I started the design for this version of the Block-O ring in late December, 2013. The design is now licensed by The Ohio State University, and is currently listed in my Etsy store (https://www.etsy.com/listing/220972937/ohio-state-buckeye-block-o-ring-in) early in 2015. The ring is sterling silver, with red and black enameled inlays. The Buckeye Leaf is 10K gold. The O-H and I-O are engraved and finished with a black oxide patina.